steel pipe welding line made by Chaochang adopt Germany brand IXYS MOSFET and Fast recovery diode, using 
induction heating as heating method , water cooling system and PLC control system. Until now we have made many succesful 
solid state welders for pipe factory customers.

Advantages of Steel pipe welding line 
1. solid state HF welder for tube mill line is much more efficient compared with vacuum tube welders.
2. Solid state welders have a compact and modular design.
3. Vacuum tube welders have a lifetime span. Solid state HF welders have semiconductor components, 
    which has no life limit . So high frequency welder is more reliable compared with vacuum tube welders.